379992 - Canvas hang

Status: RESOLVED WORKSFORME

(Core :: Graphics: Canvas2D, defect, P2)

Description

[Jesse Ruderman]

Attachment: testcase (hangs Firefox when loaded)

This hangs Firefox, at least on Mac debug.  It hangs for at least a minute (but less than an hour) and does not make the slow-script dialog appear.

Comment 1

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

This should be fixed once I upgrade cairo to 1.4.6, which has some special casing to cull traps that are outside of the surface bounds very early.  I don't think that this is critical though; it's just make-browser-take-up-cpu-cycles, no?

Comment 2

[Jesse Ruderman]

I gave this bug the "hang" keyword (and the "critical" severity to go with it) because for most users, a hang for two minutes looks like a hang forever and is likely to result in the user killing the process.

Comment 3

[-fullmetaljacket-]

this also hangs on win xp

Comment 4

[Jesse Ruderman]

Still hangs on trunk (Mac).

Comment 5

[Joe Drew (not getting mail)]

Still hangs in a current trunk build.

Comment 6

[Jeff Muizelaar [:jrmuizel]]

The CoreGraphics Azure backend should fix this on os x. We'll have to look at this win xp afterwards

Comment 7

[Florian Bender]

Latest nightly 25.0a1 (2013-07-26) @ MBA 2012 & Mac OS X 10.8.4, config: 
gfx.canvas.azure.accelerated = false
gfx.canvas.azure.backends    = cg
gfx.content.azure.backends   = cg
gfx.content.azure.enabled    = true

Testcase does not crash for me.

Comment 8

[Jesse Ruderman]

WFM on Mac and Win7.